Piston transmission device of hand riveter

Abstract

The utility model belongs to the technical field of pneumatic tools, and particularly relates to a piston transmission device of a hand riveter, which is characterized in that a body bushing is arranged in a cavity of a body, an oil pressure device is arranged in the body bushing and is respectively connected with a sliding block and an oil cylinder, and an oil cylinder bushing is arranged in the oil cylinder; an oil cylinder piston rod is respectively connected with a guide rod, a piston rod pressure spring, a rear end cover pressure spring, a rear end cover, a top sleeve spring, a top sleeve, a claw sheet pull rod, a claw sheet and a claw sheet seat; a gun head shell is in threaded connection with the right end of the oil cylinder; and an inner cavity of the claw piece seat, an inner cavity of the top sleeve, an inner cavity of the oil cylinder piston rod, an inner cavity of the guide rod and an inner cavity of the rear end cover form a rivet discharge channel. According to the piston transmission device in the technical scheme, the air inlet and the exhaust hole are formed in one side of the working direction, the trigger switch and the opening and closing pin are designed in a split mode, the operation comfort is obviously improved, the influence of air inlet and exhaust on an operator is reduced to the maximum extent, the initial kinetic energy of rivet pulling is obviously improved, and the rivet pulling effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pneumatic tool technical field, concretely relates to a kind of pull rivet gun piston transmission device. BACKGROUND

[0002] Pull rivet gun is the common tool when present riveting operation, present and has been widely used in riveting operation, present portable pull rivet gun power mainly has two kinds of pneumatic and electric, among them, electric pull rivet gun because it does not need external gas source, can be moved arbitrarily, use is more convenient, but the initial kinetic energy of electric pull rivet gun is low, the range of riveting work is limited, especially for large diameter rivet is not applicable.

[0003] Pneumatic pull rivet gun because initial kinetic energy is high, basically can satisfy present conventional riveting operation.Pull rivet gun piston transmission device takes compressed air as power source, and the internal energy is converted into piston kinetic energy and the elastic potential energy of reset spring by air expansion, respectively push pull rivet gun work and reset.The quality of the device directly affects the overall performance of pull rivet gun, and it is the core mechanical structure of pull rivet gun. UTILITY MODEL CONTENTS

[0004] The utility model is aimed at providing a kind of pull rivet gun piston transmission device to solve the problems existing in the above background.

[0005] To achieve the above object, the present application is realized by the following technical scheme:

[0006] A kind of pull rivet gun piston transmission device, including body, body bushing is arranged in the cavity of body, oil pressure device is arranged in body bushing, and one end of oil pressure device is connected with slider, the other end passes through the cavity of body and is connected with oil cylinder screw thread, body locking ring is installed in the lower end of body, air inlet and exhaust are provided on the body, the air inlet is communicated with the cavity of body by air passage, and switch component is arranged on the body for on or off air passage;

[0007] Oil cylinder bushing is arranged in oil cylinder, the left end of oil cylinder piston rod and piston rod compression spring are all loaded into the left end of guide rod, the left end of piston rod compression spring is abutted with guide rod, the right end of piston rod compression spring is abutted with the left end of oil cylinder piston rod, simultaneously, rear end cover compression spring is sleeved on guide rod, the left end of rear end cover compression spring is abutted with guide rod, the right end of rear end cover compression spring is abutted with oil cylinder piston rod, rear end cover is connected with the left end of oil cylinder screw thread, and rear end cover is abutbed with the left end of guide rod;

[0008] Oil cylinder piston rod is arranged in oil cylinder, top sleeve spring is inserted on top sleeve and is inserted on oil cylinder piston rod from the right end of oil cylinder piston rod, the right end of oil cylinder piston rod is connected with claw piece pull rod screw thread, three claw pieces are installed in the inner cavity of claw piece seat, the left end of claw piece seat is connected with the right end of claw piece pull rod screw thread;

[0009] The claw piece pull rod and the claw piece seat are arranged in the cavity of the gun head shell, and the gun head shell is threadedly connected with the right end of the oil cylinder.

[0010] The inner cavity of the claw piece seat, the inner cavity of the top sleeve, the inner cavity of the oil cylinder piston rod, the inner cavity of the guide rod and the inner cavity of the rear end cover form a rivet discharge channel.

[0011] Further, the oil cylinder comprises an oil cylinder body and an oil inlet pipe, the axis of the oil inlet pipe is perpendicular to the axis of the oil cylinder body, and the oil inlet pipe is arranged on the right side of the axial midpoint of the oil cylinder body.

[0012] Further, the elastic coefficient of the piston rod compression spring is greater than the elastic coefficient of the rear end cover compression spring.

[0013] Further, the oil pressure device comprises an oil storage pipe, a valve rod and an oil storage pipe bushing, the oil storage pipe bushing is sleeved on the valve rod, the upper end of the valve rod is inserted into the oil storage pipe, and the lower end of the valve rod is connected with the sliding block.

[0014] Further, the switch assembly, the air inlet and the air outlet are arranged on the same side of the body in the axial direction, and the side is below the connection position of the oil cylinder and the body.

[0015] Further, the switch assembly comprises a trigger, a connecting rod, a top block, an opening and closing pin, a compression spring, an oil seal, an opening and closing pin spring and a screw plug, the trigger is rotatably connected with the body through a first elastic pin, the upper end of the connecting rod is connected with the trigger through a second elastic pin, the top block is connected with the body through a third elastic pin, the left end of the top block is connected with the lower end of the connecting rod through a fourth elastic pin, the upper end of the opening and closing pin is arranged to protrude from the upper end of a switch accommodating cavity arranged in the body and communicated with the air passage and abut against the right end of the top block, the compression spring is sleeved on the opening and closing pin, the oil seal is sleeved on the lower end of the opening and closing pin, the opening and closing pin spring is arranged between the opening and closing pin and the screw plug, and the screw plug is threadedly connected with the lower end of the switch accommodating cavity.

[0016] Further, the body sheath is sleeved on the outer wall of the body.

[0017] Further, the rivet tail sleeve is threadedly connected with the rear end cover.

[0018] Further, the utility model also comprises a cover and a gun head locking ring, the cover is arranged on the right end of the gun head shell, and the gun head locking ring is sleeved on the right side of the gun head shell.

[0019] The utility model discloses the beneficial effects are:

[0020] The piston transmission device of the technical scheme places the air inlet and the air outlet on one side of the working direction, and the trigger switch and the opening and closing pin are designed in a split mode, so that the operation comfort is obviously improved, the influence of air intake and exhaust on the operator is minimized, the initial kinetic energy of the rivet is obviously improved, and the rivet effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model discloses a pull rivet gun piston transmission device explosion map.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 1, body;2, body bushing;3, O ring;4, O ring;5, oil storage pipe;6, oil seal;7, oil storage pipe bushing;8, oil storage pipe gasket;9, oil storage pipe splice cap;10, valve rod;11, valve rod nut;12, slider;13, O ring;14, O ring;15, body locking ring;16, O ring;17, open and close pin;18, compression spring;19, gasket;20, oil seal;21, open and close pin spring;22, O ring;23, screw plug;24, second elastic pin;25, trigger;26, first elastic pin;27, connecting rod;28, top block;29, oil cylinder;30, O ring;31, oil plug;32, lifting ring;33, oil cylinder piston rod;34, O ring;35, piston bushing;36, piston rod compression spring;37, rear end cover compression spring;38, guide rod;39, O ring;40, rear end cover;41, O ring;42, nail tail collecting sleeve;43, oil cylinder bushing;44, oil cylinder rod splice cap;45, top sleeve spring;46, top sleeve;47, claw rod;48, claw;49, claw seat;50, gun head shell;51, cover;52, gun head locking ring;53, silencer cover;54, fourth elastic pin;55, third elastic pin;56, body sheath. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be described below in detail in combination with the drawings, and the following examples are only exemplary and can only be used to explain and illustrate the technical scheme of the utility model, but cannot be interpreted as a limitation on the technical scheme of the utility model.

[0025] The pull rivet gun piston transmission device of the application takes compressed air as a power source, and converts internal energy into piston kinetic energy and elastic potential energy of a reset spring through air expansion to respectively drive the pull rivet gun to work and reset. The structure of the pull rivet gun involved in the application is the same as that of the existing pull rivet gun in the parts not described, and the working mode and working principle are also the same as those of the existing pneumatic pull rivet gun. The components and connection modes not described in the application can be obtained by the technical personnel in the art through the components and connection modes of the commercially available pneumatic pull rivet gun, and the description of the application is not insufficient.

[0026] The front, back, left and right in the application are not specific directions, but are for describing the relative positions of the device, and the technical personnel in the art can design them arbitrarily according to actual needs.

[0027] In the pull-rivet gun of the present application, O-rings are arranged on each connecting part for sealing, as in the existing pull-rivet gun. Since this sealing belongs to the conventional technology, the use of O-rings for sealing is not specifically described in the present application.

[0028] As shown in Figure 1 The present application provides a pull-rivet gun piston transmission device, which comprises a body 1. The body of the present application is made of metal material and has a cavity structure. The corresponding components are arranged in the cavity. This assembly method is the conventional technology. The body of the present application comprises a body main body and a body neck which is integral with the body main body. The body neck also has a cavity structure. A body bushing 2 is arranged in the cavity of the body. An oil pressure device is arranged in the body bushing. One end of the oil pressure device is connected with a sliding block 12. The other end of the oil pressure device passes through the cavity of the body and is threadedly connected with an oil cylinder 29. A body locking ring 15 is installed at the lower end of the body 1.

[0029] In the present application, the oil pressure device comprises an oil storage pipe 5, a valve rod 10 and an oil storage pipe bushing 7. The oil storage pipe bushing 7 is sleeved on the valve rod 10. The upper end of the valve rod 10 is inserted into the oil storage pipe 5. The lower end of the valve rod 10 is connected with the sliding block 12. The oil pressure device and the sliding block are arranged in the cavity. When working, the trigger 25 is pressed to make the compressed gas of the external air source enter the body bushing through the air inlet on the body. Because the position of the sliding block divides the inner cavity of the body bushing into two parts, the compressed gas enters the body bushing from the lower part, pushes the sliding block to move upward, and synchronously drives the valve rod to move upward, and pushes the hydraulic oil of the oil storage pipe to move upward into the oil cylinder.

[0030] The body of the present application is provided with an air inlet and an air outlet. Specifically, the air inlet and the air outlet are arranged on the same side of the body main body. At the same time, a switch assembly is also arranged on this side. Such arrangement can improve the comfort of operation. The air inlet is communicated with the cavity of the body through an air channel. The switch assembly is arranged on the body for opening or closing the air channel. A switch accommodating cavity is arranged on the body and communicated with the air channel to open or close the air channel through the switch assembly. In the present application, the trigger 25 and the opening and closing pin 17 are designed separately, which also improves the comfort of operation.

[0031] The main parts of the switch assembly of the present application are all conventional technologies, such as the opening and closing pin 17, the compression spring 18, the oil seal 20, the opening and closing pin spring 21, the plug 23 and the trigger 25, which can be obtained by those skilled in the art according to the conventional technologies. The key improvement of the present application is that the trigger is not directly in contact with the opening and closing pin, but is connected with the opening and closing pin through the connecting rod and the top block 28. The trigger 25 is rotatably connected with the body 1 through the first elastic pin 26, the upper end of the connecting rod 27 is connected with the trigger 25 through the second elastic pin 24, the top block 28 is connected with the body 1 through the third elastic pin 55, the left end of the top block 28 is connected with the lower end of the connecting rod 27 through the fourth elastic pin 54, the upper end of the opening and closing pin protrudes from the upper end of the switch accommodating cavity arranged in the body and communicated with the air passage and abuts against the right end of the top block, the compression spring is sleeved on the opening and closing pin, the oil seal is sleeved on the lower end of the opening and closing pin, the opening and closing pin spring is arranged between the opening and closing pin and the plug, and the plug is threadedly connected with the lower end of the switch accommodating cavity. When working, the trigger is pressed to drive the connecting rod to move upward, the lower end of the connecting rod is connected with the left side of the top block, the lever principle is used, the left end of the top block is lifted up and the right end of the top block is lowered down, the opening and closing pin abutting against the right end of the top block is pressed down, and the remaining actions are all conventional technologies. The opening and closing pin is moved downward to make the air passage conductive, and the compressed gas enters the body bushing.

[0032] The oil cylinder bushing 43 of the present application is arranged in the oil cylinder 29, the left end of the oil cylinder piston rod 33 and the piston rod compression spring 36 are all arranged in the left end of the guide rod 38, the left end of the piston rod compression spring abuts against the guide rod, the right end of the piston rod compression spring abuts against the left end of the oil cylinder piston rod, the rear end cover compression spring 37 is sleeved on the guide rod 38, the left end of the rear end cover compression spring abuts against the guide rod, the right end of the rear end cover compression spring abuts against the oil cylinder piston rod, the rear end cover 40 is threadedly connected with the left end of the oil cylinder 29 and abuts against the left end of the guide rod 38.

[0033] The oil cylinder piston rod 33 is arranged in the oil cylinder 29, the top sleeve spring 45 is sleeved on the top sleeve 46 and is then jointly inserted into the oil cylinder piston rod from the right end of the oil cylinder piston rod, the right end of the oil cylinder piston rod is threadedly connected with the claw rod 47, the three claws 48 are arranged in the inner cavity of the claw seat 49, the left end of the claw seat 49 is threadedly connected with the right end of the claw rod 47, the mounting mode of the three claws and the claw seat of the present application is the mounting mode of the prior art, and the mounting mode of the top sleeve 46, the top sleeve spring 45, the claw rod 47 and the gun head shell 50 in the present application is the mounting mode of the prior art. Similarly, it also includes the cover 51 and the gun head locking ring 52, the cover is arranged at the right end of the gun head shell, and the gun head locking ring is sleeved on the right side of the gun head shell. These are all conventional technologies, and those skilled in the art can install them according to the prior art.

[0034] The key of the application is that the oil cylinder 29 comprises an oil cylinder body and an oil inlet pipe, the axis of the oil inlet pipe is perpendicular to the axis of the oil cylinder body, the oil inlet pipe is arranged at the right part of the axial midpoint of the oil cylinder body, and the elastic coefficient of the piston rod compression spring 36 is greater than the elastic coefficient of the rear end cover compression spring 37. Through the arrangement of the structure, the starting speed of the oil cylinder piston rod is improved.

[0035] The inner cavity of the claw piece seat, the inner cavity of the top sleeve, the inner cavity of the oil cylinder piston rod, the inner cavity of the guide rod and the inner cavity of the rear end cover form a rivet discharge channel.

[0036] In the application, the body sheath 56 is sleeved on the outer wall of the body and is used for protecting the body. The rivet tail sleeve 42 is threadedly connected with the rear end cover 40 and is used for temporarily containing the rivet.

[0037] The oil cylinder 29 is provided with a filling port, and the oil plug 31 is threadedly connected with the filling port. The oil plug is provided with a lifting ring 32, so that the oil plug can be conveniently screwed off for hydraulic oil supplement.

[0038] The working principle is as follows:

[0039] The compressed air is connected through the air inlet hole located at the lower part of the body. At this time, the compressed air can directly pass through the opening and closing pin and the corresponding hole on the body and enter the lower part of the body bushing. When the trigger is pressed, the linkage, the top block and other switch components are driven to move. The air inlet hole on the opening and closing pin is in communication with the air inlet hole on the body, high-pressure air enters the body bushing, and the hydraulic oil in the oil storage pipe is extruded by the valve rod, which drives the oil cylinder piston rod in the oil cylinder to move backward, and simultaneously drives a series of clamping mechanisms such as the claw piece seat, the claw piece pull rod and the claw piece to move backward, so as to realize the rivet pulling action. After the trigger is released, the compression spring pushes the opening and closing pin to reset, the guide rod compression spring pushes the oil cylinder piston rod to reset, the top sleeve spring pushes the claw piece and other parts to reset, and the hydraulic oil pushes the piston in the body bushing to reset. The lower air is discharged through the silencer cover.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some or all of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A drive assembly for a rivet gun piston, comprising: The body, the body bushing arranged in the cavity of the body, the oil pressure device arranged in the body bushing, and one end of the oil pressure device connected with the sliding block and the other end threaded with the oil cylinder. The oil cylinder bushing is arranged in the oil cylinder, the left end of the oil cylinder piston rod and the piston rod compression spring are arranged in the left end of the guide rod, the left end of the piston rod compression spring abuts against the guide rod, the right end of the piston rod compression spring abuts against the left end of the oil cylinder piston rod, the rear end cap compression spring is sleeved on the guide rod, the left end of the rear end cap compression spring abuts against the guide rod, the right end of the rear end cap compression spring abuts against the oil cylinder piston rod, the rear end cap is threaded with the left end of the oil cylinder, and the left end of the rear end cap abuts against the left end of the guide rod. The oil cylinder piston rod is arranged in the oil cylinder, the top sleeve spring is sleeved on the top sleeve, and the oil cylinder piston rod is inserted into the oil cylinder piston rod from the right end of the oil cylinder piston rod. The claw piece pull rod and the claw piece seat are arranged in the cavity of the gun head shell. The claw piece pull rod and the claw piece seat are arranged in the cavity of the gun head shell.

2. The radial gun piston drive of claim 1 wherein, The inner cavities of the claw piece seat, the top sleeve, the oil cylinder piston rod, the guide rod and the rear end cap form a rivet discharge channel.

3. The rivet gun piston drive of claim 1 wherein, The oil cylinder includes an oil cylinder body and an oil inlet pipe, the axis of the oil inlet pipe is perpendicular to the axis of the oil cylinder body, and the oil inlet pipe is arranged on the right side of the axial midpoint of the oil cylinder body.

4. The rivet gun piston drive of claim 1 wherein, The elastic coefficient of the piston rod compression spring is greater than the elastic coefficient of the rear end cap compression spring.

5. The rivet gun piston drive of claim 1 wherein, The oil pressure device includes an oil storage pipe, a valve rod and an oil storage pipe bushing, the oil storage pipe bushing is sleeved on the valve rod, the upper end of the valve rod is inserted into the oil storage pipe, and the lower end of the valve rod is connected with the sliding block.

6. A radial gun piston drive as claimed in claim 5, wherein, The switch assembly, the air inlet and the air outlet are arranged on the same side of the body in the axial direction, and the side is below the connection position of the oil cylinder and the body.

7. The rivet gun piston drive of claim 1 wherein, The switch assembly includes a trigger, a connecting rod, a top block, an opening and closing pin, a compression spring, an oil seal, an opening and closing pin spring and a plug, the trigger is rotationally connected with the body through a first elastic pin, the upper end of the connecting rod is connected with the trigger through a second elastic pin, the top block is connected with the body through a third elastic pin, the left end of the top block is connected with the lower end of the connecting rod through a fourth elastic pin, the upper end of the opening and closing pin extends out of the upper end of a switch accommodating cavity arranged in the body and communicated with the air passage and abuts against the right end of the top block, the compression spring is sleeved on the opening and closing pin, the oil seal is sleeved on the lower end of the opening and closing pin, the opening and closing pin spring is arranged between the opening and closing pin and the plug, and the plug is threaded with the lower end of the switch accommodating cavity.

8. The radial gun piston drive of claim 1 wherein, The body sheath is sleeved on the outer wall of the body.

9. The rivet gun piston drive of claim 1 wherein, The pin tail collecting sleeve is threaded with the rear end cap. The cover is arranged on the right end of the gun head shell, and the gun head locking ring is sleeved on the right side of the gun head shell.

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